barracuda-client-api/src/react-native/Base64.ts

API Client to connect to Barracuda Enterprise Service Bus

/* tslint:disable:no-bitwise no-conditional-assignment triple-equals */
import barracudaBtoa from "btoa";
import { logDebug } from "../logging/index";

const chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
const Base64 = {
  btoa: (input: string = "") => {
    const str = input;
    let output = "";

    for (let block = 0, charCode, i = 0, map = chars;
         str.charAt(i | 0) || (map = "=", i % 1);
         output += map.charAt(63 & block >> 8 - i % 1 * 8)) {

      charCode = str.charCodeAt(i += 3 / 4);

      if (charCode > 0xFF) {
        throw new Error("'btoa' failed: The string to be encoded contains characters outside of the Latin1 range.");
      }

      block = block << 8 | charCode;
    }

    return output;
  },

  atob: (input: string = "") => {
    const str = input.replace(/=+$/, "");
    let output = "";

    if (str.length % 4 == 1) {
      throw new Error("'atob' failed: The string to be decoded is not correctly encoded.");
    }
    // noinspection JSAssignmentUsedAsCondition
    for (let bc = 0, bs = 0, buffer, i = 0;
         buffer = str.charAt(i++);
         ~buffer && (bs = bc % 4 ? bs * 64 + buffer : buffer,
         bc++ % 4) ? output += String.fromCharCode(255 & bs >> (-2 * bc & 6)) : 0
    ) {
      buffer = chars.indexOf(buffer);
    }

    return output;
  },
};

export default Base64;

/**
 * Isomorphic Btoa
 * @param {string} gaToken
 * @returns {string}
 */
export function iBtoa(gaToken: string): string {
  try {
    return barracudaBtoa(gaToken);
  } catch (e) {
    logDebug("error with btoa function from npm", e);
    return Base64.btoa(gaToken);
  }
}